Vibration preventer for bobbin magazines



April 26, 1949; R. G. TURNER 2,468,524,

VIBRATION PREVENTER FOR BOBBIN MAGAZINES Original Filed June 28, 1947 2Sheets-Sheet 1 I-NVENTOR RICHARD G. TURNER ATTORNEY April 26, 1949- R.e. TURNER 2,468,524

VIBRATION PREVENTER FOR BOBBIN MAGAZINES Original Filed June 28, 1947 2Sheets-Sheet 2 FIG. Fl.G.l2

FIGJO INVENTOR inc/14 RD 6. TURNER ATTORNEY Patented Apr. 26, 1949VIBRATION PREVENTER FOR BOBBIN MAGAZINES Richard G. Turner, Worcester,Mass, assignor to Crompton & Knowles Loom l/Vorks, Worcester, Mass, acorporation of Massachusetts Original application June 28, 1947, SerialNo.

757,875, new Patent No. 2,455,149, dated November 30, 1948. Divided andthis application May 29, 1948, Serial No. 30,091

3 Claims. 1

This is a division of my copending application Serial No. 757,875, filedJune 28, 1947, now Patent No. 2,455,149.

This invention relates to improvements weft replenishing looms and it isthe general object of the invention to provide an improved reservebobbin magazine.

The diameter of the weft wound on the re serve bobbins in a weftreplenis ing mechanism may be larger than, equal to, or: smaller thandiameter of the bobbin butts. Furthermore in the weaving of certaintypes of fabrics it not permissible to have knots or the like in theweft because of blemishes which they would produce the finished fabric.When the yarn breaks during the winding of a bobbin to be used in theweaving of such fabrics the bobbin is removed from the winding machineand sent to the loom, even though the bobbin be only partly wound. Undersuch conditions the magazine will contain bobbins some of which arefully wound and others of which have only a short mass of weft thereon.The full and partly wound bobbins, regardless of their weft diameter,will not stack properly, and the upper bobbins will have their tips sofar below their butts that they fall out of the magazine.

It is an important object of the present invention to provide a bobbinmagazine with readily adjustable guideways for both the butts and tipsof the bobbins so that by a simple manual operation the weaver canadjust the widths of the guideways to a condition which will enable thebobbins to lie substantially horizontally and therefore feed downwardlytoward transfer position without falling out of the magazine. Thus, ifseveral partly filled bobbins are in the magazine the tip guideways canbe made narrow to raise the tips and prevent objectionable tilting ofthe upper bobbins.

Since the bobbin conditions change from time to time as new bobbins areplaced in the magazine it is desirable that the widths of the guidewaysbe readily adjustable, and it is a further object of the invention toaccomplish this result by means of yielding locks which can be movedquickly easily to alter the widths of the guideways.

In the weaving of fabrics requiring two shuttles a rocking magazine maybe employed which can be shifted to place the lowest bobbin in either ofthe two bobbin stacks in transfer position. This requires a pivot forthe magazine and also generally requires that the outer or bobbin tipengaging plate oi the magazine be supported from the inner or buttengaging plate of the mega-- zine. When magazines of this type are madelarge enough to accommodate a considerable number of bobbins it is foundthat the outer plate tends to vibrate, and to correct this condition itis a further object of the present invention to pro? vide anti-vibrationguides, such as rolls, positioned to engage theinner plate of themagazine.

It is occasionally desirable to be able to effect slight adjustments inthe vertical. position of the magazine and to accomplish this result itme further object of the present invention to form the aforesaid pivotof the magazine as an eccentric to enable the magazine to be raised orlowered to place the bottom bobbins in transfer position correctly withrespect to the shuttle on the lay. Any horizontal displacement of thelower end of the magazine caused by adjustment of the eccentric can becorrected by adjustable. stops, which determine the two extreme angularpositions to which the magazine can be swung.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of myinvention is set. forth,

Fig. 1 is a side elevation partly in section of the forward part of aloom equipped with a magazine made according to the present invention,

Fig. 2 is an enlarged front elevation of the magazine looking in thedirection of arrow 2, Fig. 1,

Figs. 3 and 4 are side elevations, partly in section, looking in thedirectionsof arrowsv 3 and 4, respectively, of Fig. 2, Fig. beingenlarged,

Fig. 5 is an enlarged horizontal section on line 55 of Fig. 3 showingthe adjustment for O e of the butt guideways,

Fig. 6 is an enlarged horizontal section on line t-l5 if Fig. 1, showingthe adjustment for one. of the tip guideways,

Fig. 7 is an enlarged vertical section on line 'i'l, Fig. 2, i

Fig. 8 is a vertical section on line ll8, Fig, 7,

Fig. 9 is an enlarged vertical section on fline 9El, Fig. 3,

Fig. 10 is a diagrammatic view showing the normal relation of bobbinbutts and tips when the bobbins are fully wound, the weft and buttdiameters being the same,

Fig. 11 is a diagrammatic front elevation of a magazine containingpartly filled bobbins as they appear before adjustment of the tipguideway, and

Fig. 12 is a view similar to Fig. 11 but showing the bobbin tips raisedsubsequent to reductionin the width of the tip guidewayf Referring toFig. 1, the loom frame It has mounted thereon a support H for themagazine designated generally at M. The latter is pivoted on a stud l2extending through a hub it on the magazine support, see Fig. 9. Themagazine has an inner or butt engaging plate M and an outer or tipengaging plate I5. Plate 14 has front and back bobbin butt guideways l5and ll, respectively, while plate !5 has front and back bobbin tipguideways l8 and 19, respectively.

The bobbins B and B in the two stacks feed down their respective frontand back guideways by gravity toward transfer positions, one at thebottom of each of the bobbin stacks, as will be apparent in Fig. 3, topermit a transfer arm 23 to transfer the bobbin under it in transferposition into one or the other of two alternately active shuttles onlyone of which is shown at S. The shuttle when at the replenishing end ofthe loom occupies shuttle box 2| on lay L.

The bobbins have butts or heads 22, a mass of yarn Y, and tips 23. Thelower part of the inner plate It is provided with a spacer lug 25 whichseparates the lowest bobbins of the two stacks, and front and backbobbin butt supports 26 and 21, respectively, may be mounted in usualmanner to yield whenever the lowest bobbin in the associated guideway orstack is being transferred. In similar manner, the tips of the bobbinsmay be held by yielding supports 28 and 29 mounted pivotally on theouter magazine plate lb.

The magazine is ordinarily at rest in the position shown in l, but canrock about stud it. When a replenishing operation is to occur themagazine will remain in its normal position if the rear lowest bobbin Bis to transferred, but if the lowest bobbin B is to be transferred themagazine will be rocked. The rocking mechanism includes a rod 30pivotally connected to plate 14, a second rod 3! operated by theshifting shuttle box motion (not shown), and a bell crank lever 32.

Except as indicated hereinafter the matter thus far described may be ofthe usual construction and operates in the usual manner.

As already stated, the magazine can operate with various types ofbobbins which, because of the diameter of their yarn masses Or amount ofyarn thereon, may not stack properly or feed properly down theirguideways toward transfer position. The yarn diameter may be greater orless than the butt diameter or equal to it, and the bobbins may beeither fully wound with weft extending practically the full lengththereof, or only partly wound. The magazine may thus be supplied with anassortment of bobbins, some full and others only partly full. If a largenumber of partly full bobbins are present the tip ends of the upperbobbins will slant downwardly far enough so that they can roll out ofthe magazine and with such a group of bobbins it will be desirable tomake the tip guideways narrow. If the yarn diameter is less than thebutt diameter it will then be additionally desirable to widen the buttguideways.

In order to adapt the magazine for proper operation with these varioustypes of bobbins I make each of the guideways adjustable as to width.Considering the forward butt guideway It, for instance, the innermagazine plate 54 is formed with an integral flange or wall for theright hand parts of the bobbin butts in the left stack as viewed in Fig.3, and the lower left part of guideway 16 may also be defined by asecond integral flange or wall 36. The upper left hand part of theguideway, however, is formed by a movable wall 3! the lower end of whichis pivoted as at 38 to the plate l4.

The upper part of the movable wall 31 is held in position by means shownmore particularly in Fig. 5. The plate It is provided with a horizontalslot 5E} and a series of holding teeth 4| on the inner or left hand sidethereof, as viewed in Fig. 2. The wall 37! has a flange 22 lying flatagainst the surface 53 of plate M. Bolt 35 passes through the flange 62and slot 36 and has its outer end surrounded by a compression springlocated in the cylindrical shell or cup 41 of a yielding lock or holdingmember 38. The latter has teeth 49 which are normally urged into holdingrelation with teeth M by the spring.

The movable back wall 58 for the rear guideway if is similar to the wall3? except that its pivot 5i is lower than pivot 33. It is also heldadjustably in position by mechanism similar to that shown in Fig. 5.

In like manner, the outer magazine plate I5 is provided with adjustablefront and back walls 55 and 555, respectively, to cooperate with flangesor walls 5? and 58, respectively, integral with plate l 5 to define thebobbin tip guideways. The walls 55 and 55 are pivoted as at 5B and havebolts ii, see Fig. 6, provided with the same character of fittings shownin Fig. 5 and passing through slots 62 in plate it.

From the matter thus far described it will be apparent that each of theadjustable walls 37,

55 and 56 can be moved readily from one position to another merely bymovement of the adjustable clamping or locking members 4'3 in directionsto release teeth ts from teeth 4|. After the walls have been moved totheir new positions the members 48 can be released, whereupon theirsprings will reengage teeth 3! and 9 to hold the movable walls in theiradjusted positions.

Diagrammatie Fig. 10 shows the normal arrangement of the bobbins whenthey are all fully wound and of a given weft diameter, as for instancewhen the latter equals the butt diameter.

Both the butt and tip guideways will be flared so that their wallsdiverge upwardly to permit the bobbins to be staggered to preventrolling due to loom vibration. If the bobbins should not all be fullywound, and two of them have short masses of weft as in Fig. 11, the topbobbins will be tilted and will tend to fall out of the magazine. Underthese conditions the tip guideway will be too wide, and its movable wallwill be moved toward the fixed wall, thereby causing the tips to rise asthey come more nearly into vertical alignment. The bobbins will then bein positions such as shown in Fig. 12, and will be in proper positionfor correct downward feeding.

A similar adjustment can be made if the yarn diameters are larger thanthe butt diameters and some of the bobbins are only partly wound. Ifmovement of the adjustable tip wall does not give all the correctionneeded the movable butt wall can be moved away from its fixed wall.These adjustments can be made even if the yarn diameter equals the buttdiameter, provided some of the bobbins are only partly full of weft.

It will therefore be seen that full and partly wound bobbins can beplaced in the magazine stacks in any order and the movable wallsadjusted to effect substantial horizontal alignment of the bobbins.These adjustments are able to move the bobbins as described due to thefact that the butt and tip guideways are normally flared upwardly, thuspermitting adjustment of the movable walls toward their fixed walls.

The inner and outer magazine plates are held together by a brace 65having feet 65 secured to the plates and joined by a horizontal sectionii? the length of which determines the distance between the magazineplates. The feet are suitably secured to their respective plates as at63 so that the outer plate derives its entire support from the innerplate i i.

The second feature of the invention relates to steadying or vibrationpreventing means for the magazine. As shown in Figs. 3 and 7, themagazine support H is provided with two antivibration members it made asshown in Fig. 8. Each support has a shank threaded into the support Hand held in adjusted longitudinal position by a lock nut H. The end ofeach member 7!] adjacent to the inner magazine plate [4 is provided witha ball '12 which bears against an anti-friction plate 13 secured to themagazine plate and rolls freely in its socket 69 when the magazinerocks. These members 1B are located a considerable distance below thepivot stud I2 and when properly set to engage plate 13 preventobjectionable vibration of the magazine, particularly the outer plate.Obviously other forms of anti-friction devices than the balls 12 can beutilized, but whatever form the mem hers is take the magazine whenrocked incident to a replenishing operation will be caused to move witha minimum of twisting, and the lowest bobbins B and B will be parallelto the shuttle box 2|.

The rod is connected to the magazine at a point not far removed from thes-teadying members 16 and this relationship results in proper movementof the outer magazine plate l5 when the magazine is rocked. A spring 14acts to return the magazine to normal position subsequent to swinging byrod 30.

The third feature of the invention relates to the vertical adjustment ofthe magazine. As shown in Fig. 2, support H is provided with a stoppinglug 15 shown in cross section in Fig. '7 This lug is adapted forengagement with one or the other of the front and back stop screws 16and 7?, respectively, which are mounted on the inner magazine plate M.These screws are adjustable so as to determine the correct transferpositions of the lowest bobbins in the front and back stacks.

The previously described stud l2 has a shank 80 rockable in the hub i3and has an eccentric end 81 passing through a hub 82 on the insidemagazine plate M. Nut 84 clamps the hub 82 against shoulder 85 of studl2 and lock nut 86 holds the setting. The nuts when loosened permitturning of stud l2 so that the eccentric 8! can cause rising or fallingof the magazine as a whole. As shown in Fig. 9 the magazine is in itslowest position adaptable to small weft diameters, but the magazinewould be raised to provide added clearance if large diameter wefts arewound on the bobbins. If there should be any back and forth movement ofthe magazine due to turning of the eccentric the adjusting screws 76 and11 can be altered to locate the lowest bobbins in the magazine correctlyfor transfer.

From the foregoing it will be seen that I have provided a magazinewherein bobbins of various amounts of weft wound thereon can be alignedso they will remain in the magazine and feed downwardly in their stackstoward transfer position. Any one of several assortments of bobbins canbe placed in the guideways at random and when so placed the movableguideway walls can be adjusted as described to establish 1e widths ofthe guideways best suited to the bobbins. While the movable guidewaywalls have been described in connection with a particular kind ofholding device, such as the members @3, I do not wish necessarily thusto be limited, since any suitable holding means by which the adjustedwidths of the guideways may be retained will serve the purpose of thepresent invention. It will also be noted that the steadying members itare adjustable toward and from the magazine and are at a considerabledistance below the pivot stud l2 and not far from the point at which aturning force is applied to the magazine by rod 39. Wear plate 73 is notessential but is desirable. Also, the eccentric stud l2 permits avertical adjustment of the magazine with respect to the shuttle box, andthe adjustable stop screws 76 and Ti afford compensation for any backand forth misplacement of the lowest bobbins in the magazine resultingfrom adjustment of the eccentric. The details of the bobbin guides setforth hereinbefore are not claimed herein but form the subject matter ofthe parent application of which this is a divisionv Also, thehereinbefore described vertical adjusting means for the bobbin magazineis not claimed herein but is claimed in copending application Serial No.30,092 filed on even date herewith.

Having thus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom having a support, a pivot on saidsupport, a rocking magazine on said pivot, means to move said magazineabout said pivot, and anti-vibration roll members engaging the magazineto prevent vibration of the latter when the same is moved by said means.

2. In a weft replenishing loom having a support, a pivot on saidsupport, a magazine on said pivot, means to move said magazine angularlyabout said pivot, a member mounted on said support for adjustment towardand from the magazine, and roll means on said member engaging themagazine to prevent vibration thereof when said means moves the magazineangularly about said support.

3. In a weft replenishing loom having a support, a pivot on saidsupport, a magazine on said pivot including an end plate, means to movesaid magazine about said pivot, a wear member secured to and normallyrigid with respect to said end plate, and anti-vibration means engagingsaid wear member to prevent vibration of said magazine when the latteris moved by said means.

RICHARD G. TURNER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

